Dead Man's Switch

picture info	Dead Man's Switch A dead man's switch (see alternative names) is a switch that is designed to be activated or deactivated if the human operator becomes incapacitated, such as through death, loss of consciousness, or being bodily removed from control. Originally applied to switches on a vehicle or machine, it has since come to be used to describe other intangible uses, as in computer software. These switches are usually used as a form of fail-safe where they stop a machine with no operator from a potentially dangerous action or incapacitate a device as a result of accident, malfunction, or misuse. They are common in such applications in locomotives, aircraft refuelling, freight elevators, lawn mowers, tractors, personal watercraft, outboard motors, chainsaws, snowblowers, tread machines, snowmobiles, amusement rides, and many medical imaging devices. On some machines, these switches merely bring the machines back to a safe state, such as reducing the throttle to idle or applying brakes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Amusement Ride Amusement rides, sometimes called carnival rides, are mechanical devices or structures that move people especially kids to create fun and enjoyment. Rides are often perceived by many as being scary or more dangerous than they actually are. This could be due to the design or from hearing about accidents involving rides that are similar. They are expected at most annual events such as fairs, traveling carnivals, and circuses around the world. Sometimes music festivals and concerts also host amusement park rides. Types of rides * Flat rides are usually considered to be those that move their passengers in a plane generally parallel to the ground, such as rides that spin around a vertical axis, like carousels and twists, and ground level rides such as bumper cars and The Whip. * Gravity rides are those where gravity is responsible for all or some of the movement, and where any vertical movement is not about a fixed point, such as roller coasters, water slides, and drop t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Birney A Birney or Birney Safety Car is a type of streetcar that was manufactured in the United States in the 1910s and 1920s. The design was small and light and was intended to be an economical means of providing frequent service at a lower infrastructure and labor cost than conventional streetcars. Production of Birney cars lasted from 1915 until 1930, and more than 6,000 of the original, single-truck version were built. Middleton, William D. (1967). ''The Time of the Trolley'', pp. 122–127, 210, 414. Milwaukee: Kalmbach Publishing. . Several different manufacturers built Birney cars. The design was "the first mass-produced standard streetcar (albeit with minor variations)" in North America. Invention The Birney car was the joint 1915 invention of Charles Birney and Joseph Bosenbury (who was issued the patents in 1917 and 1919, and assigned half to Birney; see Brill page 140). Birney was an engineer with the firm of Stone & Webster, an operator of a number of trolley systems in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]